LS2- Matter cycles and energy flows through an ecosystem.



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Click on the GSE numbers, e.g PS1 (K-2) - POC - 2, in the table below to reach additional information about each GSE.

Grade Span Expectations (K-4)


Grade Span Expectations (5-8)

Grade Span Expectations (HS)




LS2 (5-6) - 7
Students demonstrate an understanding of recycling in an ecosystem by …

7a explaining the processes of precipitation, evaporation, condensation as parts of the water cycle.

7b completing a basic food web for a given ecosystem

LS2 (7-8) - 7
Students demonstrate an understanding of recycling in an ecosystem by …

7a diagramming or sequencing a series of steps showing how matter cycles among and between organisms and the physical environment.

7b developing a model for a food web of local aquatic and local terrestrial environments.

7c explaining the inverse nature or complementary aspects of photosynthesis/respiration in relation to carbon dioxide, water and oxygen exchange.

7d conducting a controlled investigation that shows that the total amount of matter remains constant, even though its form and location change as matter is transferred among and between organisms and the physical environment (e.g., bottle biology, mass of a closed system over time).

LS2 (9-11) - 5
Students will evaluate potential bias from a variety of media sources in how information is interpreted by…

5a analyzing claims from evidence and sources and evaluate based upon relevance, and validity.

5b applying additional scientific data to develop logical arguments concerning environmental issues (e.g. tobacco company vs. cancer society articles on effects of smoking, government/big business vs. environmental perceptions of global climate change).

Example Extension(s)